______ around the clock for two days，David managed to finish the report for the manager on schedule.
| A．Working | B．Worked |
| C．Having worked | D．To work |
—I did not give offence to you ___________.
—Forget it. Let’s make up.
| A．accidentally | B．casually | C．occasionally | D．deliberately |
I think he is taking an active part in social work. I agree with you ___________.
| A．in a way | B．on the way | C．by the way | D．in the way |
It took a long time for the connection between body temperature and illness ___________.
| A．to make | B．to be made | C．making | D．being made |
Work gets done __________ when people do it together and the rewards are higher too.
| A．easily | B．very easy | C．more easily | D．easier |
—I don’t think I need to buy that toy penguin—it’s for kids.
—__________you don’t have kids, buy it anyway because it looks good.
| A．As if | B．Even if | C．In spite of | D．Even so |